Enter value in g:
Converting ounces to grams is essential in culinary, laboratory, and postal applications where precise mass measurement is required. The avoirdupois ounce is widely used in the US and UK, and the gram is the SI unit. This refreshed guide—using all heading levels—provides clear definitions, alternative derivations, contextual examples, practical tips, and best practices for accurate oz ↔ g conversions.
Internationally defined as:
1 oz = 28.349523125 g
Based on the pound (lb):
1 lb = 453.59237 g and 1 lb = 16 oz, so dividing:
453.59237 g ÷ 16 = 28.349523125 g per oz.
To convert grams back to ounces:
1 g = 0.03527396195 oz
For everyday use, rounding to two decimal places (28.35 g/oz) is sufficient; use three decimals (28.350 g) for laboratory accuracy.
Store conversion constants as OZ_TO_G = 28.349523125 and G_TO_OZ = 0.03527396195 in a central configuration file.
Verify the mass value is in ounces (oz) and not troy ounces (for precious metals).
• To get grams: value_oz × 28.349523125.
• To get ounces: value_g × 0.03527396195.
Round to your desired precision and append the appropriate unit.
If a recipe calls for 3 oz of flour:
3 × 28.349523125 = 85.04857 g → 85.05 g.
A sample weighs 0.25 oz:
0.25 × 28.349523125 = 7.08738 g → 7.087 g.
A package marked 10 oz:
10 × 28.349523125 = 283.49523 g → 283.50 g.
When converting mixed weights (e.g., “2 lb 4 oz”), convert the pounds first, add the ounces, then multiply by the factor.
| Ounces | Grams |
|---|---|
| 0.25 | 7.09 |
| 0.5 | 14.17 |
| 1 | 28.35 |
| 2 | 56.70 |
| 5 | 141.75 |
| 16 | 453.59 |
const OZ_TO_G = 28.349523125;
function ozToG(oz) { return oz * OZ_TO_G; }
console.log(ozToG(3).toFixed(2)); // "85.05"OZ_TO_G = 28.349523125
def oz_to_g(oz):
return oz * OZ_TO_G
print(f"{oz_to_g(0.25):.3f}") # 7.087
Cell A2 contains ounces:
=A2*28.349523125 → grams
Use named ranges (e.g., Ounces, Grams) for clarity and reusability.
Ensure inputs are non-negative numbers to avoid calculation errors.
Decide between fixed decimals versus significant figures based on context and document your choice in methodology.
Store conversion logic in a shared utility or microservice to maintain consistency across applications.
Log conversions with input, output, user, and timestamp in regulated environments for traceability.
Whether for recipes, lab work, or shipping, using a precise and centralized approach to convert ounces to grams—backed by clear procedures, examples, and best practices—ensures accuracy and consistency across all workflows.
Converting ounces to grams is essential in culinary, laboratory, and postal applications where precise mass measurement is required. The avoirdupois ounce is widely used in the US and UK, and the gram is the SI unit. This refreshed guide—using all heading levels—provides clear definitions, alternative derivations, contextual examples, practical tips, and best practices for accurate oz ↔ g conversions.
Internationally defined as:
1 oz = 28.349523125 g
Based on the pound (lb):
1 lb = 453.59237 g and 1 lb = 16 oz, so dividing:
453.59237 g ÷ 16 = 28.349523125 g per oz.
To convert grams back to ounces:
1 g = 0.03527396195 oz
For everyday use, rounding to two decimal places (28.35 g/oz) is sufficient; use three decimals (28.350 g) for laboratory accuracy.
Store conversion constants as OZ_TO_G = 28.349523125 and G_TO_OZ = 0.03527396195 in a central configuration file.
Verify the mass value is in ounces (oz) and not troy ounces (for precious metals).
• To get grams: value_oz × 28.349523125.
• To get ounces: value_g × 0.03527396195.
Round to your desired precision and append the appropriate unit.
If a recipe calls for 3 oz of flour:
3 × 28.349523125 = 85.04857 g → 85.05 g.
A sample weighs 0.25 oz:
0.25 × 28.349523125 = 7.08738 g → 7.087 g.
A package marked 10 oz:
10 × 28.349523125 = 283.49523 g → 283.50 g.
When converting mixed weights (e.g., “2 lb 4 oz”), convert the pounds first, add the ounces, then multiply by the factor.
| Ounces | Grams |
|---|---|
| 0.25 | 7.09 |
| 0.5 | 14.17 |
| 1 | 28.35 |
| 2 | 56.70 |
| 5 | 141.75 |
| 16 | 453.59 |
const OZ_TO_G = 28.349523125;
function ozToG(oz) { return oz * OZ_TO_G; }
console.log(ozToG(3).toFixed(2)); // "85.05"OZ_TO_G = 28.349523125
def oz_to_g(oz):
return oz * OZ_TO_G
print(f"{oz_to_g(0.25):.3f}") # 7.087
Cell A2 contains ounces:
=A2*28.349523125 → grams
Use named ranges (e.g., Ounces, Grams) for clarity and reusability.
Ensure inputs are non-negative numbers to avoid calculation errors.
Decide between fixed decimals versus significant figures based on context and document your choice in methodology.
Store conversion logic in a shared utility or microservice to maintain consistency across applications.
Log conversions with input, output, user, and timestamp in regulated environments for traceability.
Whether for recipes, lab work, or shipping, using a precise and centralized approach to convert ounces to grams—backed by clear procedures, examples, and best practices—ensures accuracy and consistency across all workflows.